Adaptive compensation method for self-heating error in electricity meters based on multi-stage characteristics

Abstract

An adaptive compensation method for self-heating error in electricity meters divides the self-heating process into three distinct stages: initial rapid rise, slow rise, and stable stage. The method monitors current load conditions and applies different mathematical models for each stage to calculate compensation values. The initial stage uses an exponential model, the slow rise stage uses a quadratic model, and the stable stage uses a linear model. Compensation parameters are calibrated through curve fitting of experimental data. The method achieves more accurate error compensation compared to conventional single-model approaches, particularly during the initial rapid rise stage. The method is implemented purely in software and can be deployed through firmware updates.

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